Porter Stuart D
Director · Ten-percent owner · LIXT, AIRJ, CHX
As of 2026-09-16, Porter Stuart D has 24 Form 4 transactions on record across 3 companies — 16 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-01-15 | AIRJ | Purchase | 153,846 @ $3.25 | $500K | +24.7% of holding | 776,879 | Form 4 |
| 2025-12-10 | AIRJ | Purchase | 264,150 @ $2.95 | $779K | +73.6% of holding | 623,033 | Form 4 |
| 2025-12-09 | AIRJ | Purchase | 46,800 @ $2.84 | $133K | +15.0% of holding | 358,883 | Form 4 |
| 2025-12-08 | AIRJ | Purchase | 31,695 @ $2.77 | $88K | +11.3% of holding | 312,083 | Form 4 |
20 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-07-10 | — | Option exercise | 150,000 | 0 | Form 4 |
| 2026-07-10 | — | Award / grant | 150,000 | 150,000 | Form 4 |
| 2026-07-10 | — | Option exercise | 150,000 | 1,199,357 | Form 4 |
| 2026-07-10 | — | Option exercise | 150,000 | 1,199,357 | Form 4 |
| 2026-05-29 | LIXT | Award / grant | 25,000 | 25,000 | Form 4 |
| 2026-05-28 | AIRJ | Option exercise | 28,037 | 804,916 | Form 4 |
| 2026-05-28 | AIRJ | Award / grant | 30,227 | 30,227 | Form 4 |
| 2026-05-28 | AIRJ | Option exercise | 28,037 | 0 | Form 4 |
| 2025-12-04 | — | Award / grant | 150,000 | 150,000 | Form 4 |
| 2025-12-04 | — | Option exercise | 150,000 | 0 | Form 4 |
| 2025-12-04 | — | Option exercise | 150,000 | 1,049,357 | Form 4 |
| 2025-12-04 | — | Option exercise | 150,000 | 1,049,357 | Form 4 |
| 2025-07-16 | CHX | Award / grant | 2,771 | 26,066 | Form 4 |
| 2025-07-16 | CHX | Disposition | 26,066 | 0 | Form 4 |
| 2025-07-16 | CHX | Disposition | 26,066 | 0 | Form 4 |
| 2025-05-29 | AIRJ | Option exercise | 5,400 | 0 | Form 4 |
| 2025-05-29 | AIRJ | Award / grant | 28,037 | 28,037 | Form 4 |
| 2025-05-29 | AIRJ | Option exercise | 5,400 | 280,388 | Form 4 |
| 2024-12-30 | AIRJ | Gift | 1,530 | 274,988 | Form 4 |
| 2024-12-26 | AIRJ | Gift | 17,600 | 276,518 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.